Fuel Requirements; Glossary Of Terms - Triumph Tiger Service Manual

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FUEL REQUIREMENTS
Fuel Requirements - all countries except USA
Outside America, all motorcycles are designed to be run
on 95 RON unleaded fuel.
Fuel Requirements - USA
In the United States of America where the octane rating
of fuel is measured in a different way, the following
information may be applied: Triumph motorcycles are
designed to run on unleaded gasoline with a CLC or AKI
octane rating (R+M)/2 of 89 or higher.
'" CAUTION: The use of leaded gasoline is
~
illegal in some countries, states or
territories. Check local regulations before using ,
leaded gasoline.
Oxygenated Gasoline
To help in meeting clean air standards, some areasofthe
U.S. use oxygenated gasoline to help reduce harmful
emissions. Triumph motorcycles will give best
performance when using unleaded gasoline. However,
the following should be used as a guide to the use of
oxygenated fuels.
",. CAUTION: Because of the generally
~
higher volatility of oxygenated fuels,
starting, engine response and fuel consumption
may be adversely affected by their use. Should
any of these difficulties be experienced, run the
motorcycle on normal unleaded gasoline.
Ethanol
Ethanol fuel is a mixture of 10% ethanol
~nd
90%
gasoline and is often described under the names
'gasohol', 'ethanol enhanced', or 'contains ethanol'. This
fuel may be used in Triumph motorcycles.
Methanol
'" CAUTION: Fuels containing methanol
~
should not be used in Triumph
motorcycles as damage to components in the fuel
system can be caused by contact with methanol.
MTBE (Methyl Tertiary Butyl Ether)
The use of gasolines containing up to 15% MTBE
(Methyl Tertiary Butyl Ether) is permitted in Triumph
motorcycles.
FUEL SYSTEM/ENGINE MANAGEMENT 9
9.7
GLOSSARY OF TERMS
The following terms and abbreviations will be found in
this section. Below is given a brief explanation of what
some of the more common terms and abbreviations
mean.
Adaptive Stepper Position
The position of the idle air control valve stepper motor
after adapting to a particular engine's operational
characteristics.
Air temperature
The intake air temperature in the air bOX.,
Air temperature sensor
Measurement in volts at the Electronic Control Module
(ECM) of the air temperature in the air box as signalled by
the air temperature sensor. Data is read out on the
diagnostic tool in degrees Celsius.
ATDC
After Top Dead Centre.
Barometric pressure
Pressure of the air in the air box.
Battery voltage
The voltage at the input to the Electronic Control Module
(ECM).
BTDC
Before Top Dead Centre.
Calculated load
The actual volume of air per stroke flowing into the
engine, expressed as a percentage of the maximum
volume that can enter. Provides an indication of the
percent engine capacity that is being used (100%
=
full
throttle).
Catalyst
Device placed in the exhaust system which reduces
exhaust emissions.
Closed loop fuelling
Fuel system incorporating a catalyst and oxygen sensor
which helps to maintain air fuel ratios within a specific
band.